Offshore wind energy system

Abstract

An offshore wind energy system comprising a foundation having a first hollow structural element with a longitudinally extending, circumferential first wall. A cable bushing penetrates through the first wall and is arranged in the first wall. At least one cable guide arrangement extends in a radial direction and is arranged at an outer shell surface of the first wall of the first hollow structural element. The cable guide arrangement is configured to guide a submarine cable exiting the cable bushing from the cable bushing to a submarine bottom surface.

The invention claimed is: 
     
       1. An offshore wind energy system, comprising:
 a foundation having a first hollow structural element with a longitudinally extending, circumferential first wall, 
 wherein a cable bushing is arranged entirely within the first wall, and 
 at least one cable guide arrangement extending in radial direction, wherein the at least one cable guide arrangement is configured to guide a submarine cable exiting the cable bushing from the cable bushing to a submarine bottom surface, 
 wherein the at least one cable guide arrangement and at least one element of the at least one cable guide arrangement do not directly contact an outer shell surface of the first hollow structural element and are arranged at a radial distance between 0.25 m and 3 m from the outer shell surface. 
 
     
     
       2. The offshore wind energy system according to  claim 1 ,
 wherein 
 the cable bushing of the first hollow structural element in an installation state of the foundation is at least above 5 m above an underwater bottom surface. 
 
     
     
       3. The offshore wind energy system according to  claim 2 , wherein the cable bushing of the first hollow structural element in an installation state of the foundation is at least above 6 m above the underwater bottom surface. 
     
     
       4. The offshore wind energy system according to  claim 3 ,
 wherein the cable bushing of the first hollow structural element in an installation state of the foundation is between 8 m and 12 m above the underwater bottom surface. 
 
     
     
       5. The offshore wind energy system according to  claim 1 ,
 wherein the foundation comprises: 
 a second hollow structural element having an overlap portion projecting beyond an end portion of the first hollow structural element and having an embedded portion at least partially embeddable in the underwater bottom, 
 the cable bushing of the first hollow structural element is arranged at least above the overlap portion. 
 
     
     
       6. The offshore wind energy system according to  claim 5 , wherein
 an annular space between an inner shell surface of the second hollow structural element and the outer shell surface of the first hollow structural element is at least partially grouted, 
 and/or 
 an annular space between an outer shell surface of the second hollow structural element and an inner shell surface of the first hollow structural element is at least partially grouted. 
 
     
     
       7. The offshore wind energy system according to  claim 1 ,
 wherein 
 the at least one cable guide arrangement comprises at least one support element configured to at least vertically support the submarine cable. 
 
     
     
       8. The offshore wind energy system according to  claim 7 , wherein
 a height of the at least one support element is reduced stepwise or continuously in the radial direction. 
 
     
     
       9. The offshore wind energy system according to  claim 7 , wherein
 the at least one support element is a precast concrete element. 
 
     
     
       10. The offshore wind energy system according to  claim 9 ,
 wherein 
 an at least one support element comprises a cable receptacle for guiding the submarine cable, 
 a shape of the cable receptacle corresponds to a shape of the submarine cable. 
 
     
     
       11. The offshore wind energy system according to  claim 10 , wherein
 the cable receptacle is a channel-like recess extending in a radial direction in an upper surface of the at least one support element, 
 wherein a diameter of the recess is at least larger than an outer diameter of the submarine cable. 
 
     
     
       12. The offshore wind energy system according to  claim 7 , wherein
 the at least one support element is a cable tensioning arrangement anchorable to the underwater bottom. 
 
     
     
       13. The offshore wind energy system according to  claim 1 ,
 wherein 
 the at least one cable guide arrangement comprises at least one cable fixing module configured to fix the submarine cable to the at least one cable guide arrangement. 
 
     
     
       14. The offshore wind energy system according to  claim 13 , wherein
 the at least one cable fixing module is a clip mechanism. 
 
     
     
       15. The offshore wind energy system according to  claim 13 , wherein
 the at least one cable fixing module is a backfill material. 
 
     
     
       16. The offshore wind energy system according to  claim 15 , wherein
 the backfill material is a cable cement. 
 
     
     
       17. An offshore structure, comprising:
 at least one offshore wind energy system according to  claim 1 ; and 
 at least one offshore device supported by a foundation of the at least one offshore wind energy system. 
 
     
     
       18. The offshore structure according to  claim 17 , wherein
 the offshore structure is an offshore wind energy structure.